Apopulation of sea life was very successful in its marine environment. suddenly, this sea life experienced a rapid decrease in population and ultimately, extinction. which of the following processes most likely led to this extinction?

Amountain created from tectonic activity would be considered which type of landform ? a) primary landform b) secondary landform

1. crust 1 the metallic layer at the earth's center 2. inner core 3 the firm layer between the crust and the asthenosphere 3. lower mantle 2 the layer surrounding the inner core 4. asthenosphere 4 the semi-solid layer between the top layer and the upper mantle 5. upper mantle 5 the layer between the asthenosphere and lower mantle 6. top layer 6 the earth's outermost layer 7. outer core 7 the hottest part of the mantle

Which of the following types of nonrenewable fuel sources requires the storage of radioactive waste? a. coal b. nuclear c. solar d. oil